Electron-electron and electron-hole pairing in graphene structures

Details Electron-electron and electron-hole pairing in graphene structures Electron-electron and electron-hole pairing in graphene structures

2010-05-26

arxiv.org/abs/1005.4857v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages with 4 figures; accepted for publication in Phil. Trans. Roy. Soc. A

Scientific paper

The superconducting pairing of electrons in doped graphene due to in-plane and out-of-plane phonons is considered. It is shown that the structure of the order parameter in the valley space substantially affects conditions of the pairing. Electron-hole pairing in graphene bilayer in the strong coupling regime is also considered. Taking into account retardation of the screened Coulomb pairing potential shows a significant competition between the electron-hole direct attraction and their repulsion due to virtual plasmons and single-particle excitations.

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